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Patented Mar; 2|, I899,

- 0. POHLIT,

BBEEGII CLOSING MECHANISM FOR GUNS.

(Application filed Jan. 26, 1898.)

(No Model.) 3 SheeIs-Sheat I.

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Patented Mar. 2;, I899.

3 Sheets-6h! 2.

No. 62l,58|.

C. POI-[LIT BREEGH CLOSING MECHANISM FOR GUNS.

(Application filed Jan. 26, 1898.)

(No Model.)

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No; 62!.58l. I Patent ed Mar. 2|, l899.

C. POHLIT.

BBEEGH CLOSING MECHANISM FOR GUNS.

(Application filed (fan. 26, 1898.) (No Model.) 3 Sheets-Sheet 3.

Human STATES ATENT Erica.

CARL POHLIT, or ESSEN, GERMANY, ASSIGNOR o FRIED. KRUPP, OF

' SAME PLACE. I

BREECH-C LOSING MECHANISM FOR GUNS.

SPECIFICATION forming part of Letters Patent NO. 621,581, dated. March 21, 1899.

4 Application filed January 26, 1898. fierial No. 668,018. (No model.)

To all whom, it may concern.-

Be it known that I, CARL POHLIT, a citizen.

of the Germ an Empire, residing at Essen, Germany, have invented new and useful Improvements in or Connected with Push-Lever Arrangements for Screw Breech-Closing Mechanisms for Guns and Ordnance, of which the following is a specification.

In the heretofore-known screw breech-c1os ing mechanisms for guns and ordnance, in which the breech is opened and closed by means of an actuating-lever engaging in a curved slot or groove in the breech screw-block, the friction arising between the actuating-lever and the breech screw-block is so great as to considerably diminish the practical utility of the breech mechanism.

Now according to the present invention the arrangement of the actuating-lever and of the slot provided for the same in the breech screwblock-is such that the force for effecting the opening and closing of the breech always acts at right angles to the radially-formed contactsurface of the screw breech-block. Consequently no cam action takes place between the actuating-lever and the slot in the screw breech-block, as in the constructions heretofore known; but, on the contrary, a direct and almost frictionless driving of the screw breechblock by the actuating-lever results.

The nature of my invention will be best understood when described in connection with the accompanying drawings, in which Figure 1 represents a rear elevation of the breech with the breech closed. Fig. 2 is a horizontal section on the line 2 2, Fig". 1, the breech being closed. Fig. 3 is a similar view to that shown in Fig. 2, the actuating-lever being turned in a horizontal plane through about ninety degrees and the breech-block screw being unlocked. Fig. 4 shows the actuating-lever partly in section and in plan. Fig. 5 is a plan of the breech when completely opened. Fig. 6 shows a rear elevation of the screw breech-block, illustrating the slot for the pin of the actuating-lever, also showing the slot for the actuating-lever by two horizontal projections.

Referring to the drawings,the letterA designates the actuating-lever,which is pivoted at its right-hand end on the vertical bolt d in the rotation of the breech-block are situated in one and the same plane. The pin a of the actuating-lever has the form of a cylinder, the axis of which passes through the point of intersection of the rotary axes of the actuating-lever and the breech -block and is inclined to the axis of rotation of the actuating-lever. Hence it follows that during the rotation of the actuating-lever A around the bolt 61 the axis of the cylindrical pin a movesin a cone= t. (2., describes a cone-the apex of which is situated at the point of intersection of the axis of the bolt 01 and the axis of the breechblock. The pin otthus is always situated radially to the screw breech-block, and a full straight side line of the cylindrical pin of the actuating-lever will always be in bearing with the radial slot of the screw breech-block.

In order to open the breech, the actuating lever is moved away from the breech-block in a horizontal direction. In the first portion of the rotary movement of the actuating-lever its pin a, by reason ofits sliding in the slot 19, (which is arranged radially to the axis of the screw-block,) compels the breech block to make an axial rotation through forty-five degrees, whereby its locking-threads become disengaged from the threads of the breech: block chamber.v

From the arrangement of the actuating-1ever and of the slot in the breech-block it will be readily understood that when the actuating-lever is rotated the breech-block will be carried directly along with it and that consequently the friction will be reduced to a minimum. If afterthe completion of the first portion of the rotation of the actuating-lever the force for opening the breech continues to act upon the actuating-lever, then the nose e of the actuating-lever strikes against the rear surface ofthe carrier, so that now the whole breech-block and breech mechanism is swung out of the gun-barrel, turning on the bolt 0 as a pivot, Fig. 5. I

Similar to the opening operation the closing of the breech is effected by means of a single movement of the actuating-lever.

What I claim as new is In a fermeture for breech-loading guns of the interrupted-thread system, the combination of the actuating-lever A pivoted within the carrier-arm C by a bolt d, and provided at its inner end with a cylindrical pin a, the axis of which passes through the points of intersection of the axes of rotation of the actuating-lever A and of the breech-block B, and a radial notch 1) within the breech-block adapt- CARL POHLIT.

Witnesses:

WILLIAM EssENWEIN, J OH. BAKER. 

